<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>vue</title>
    <script type="text/javascript" src="../../js/vue.js"></script>

</head>
<body>
    <div id="root">
        <h5>今天天气{{info}},{{x}}</h5>
        <!-- <button @click="isHot = !isHot;x ++">切换天气</button> -->
        <button @click="changeWeather">切换天气</button>
    </div>

    <script type="text/javascript">
        Vue.config.performance = false;
        const vm = new Vue({
            el:'#root',
            data() {
                return {
                  isHot:true,
                  x:0
                };
            },
            computed:{
                info(){
                    return this.isHot ? '炎热' : '凉爽'
                }
            },
            methods: {
                changeWeather(){
                    this.isHot = !this.isHot
                    this.x = this.x + 1
                }
            },
        })

    </script>

</body>
</html>